Questions tagged [labview]

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4-axis control card compatible with LabView [closed]

I am looking for a 4-axis control card to control 4 actuators to be interfaced with LabView. Years ago National Instruments use to offer such solutions, but now I can't seem to find it anymore. Any ...
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How to implement a Control System when I have two parameters that control said system?

I've got a system that uses two parameters, let's call them F and P, to control the mass flow rate of a substance flowing into a chamber. I need to control the concentration (grams per cubic meter) of ...
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Problem creating a VI when importing a DLL in Labview

I want to import a DLL to Labview and create VIs from my functions. For simple functions with common data types, it works well. My problem is when the function has a struct data type. I followed ...
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3 answers
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How do I reduce strain gage drift?

my name is Joe Vaccarella. I am a research assistant at the University of Rochester. I’m currently conducting a project where I have 4 strain gages, mounted on a polycarbonate tube. (one gage on each ...
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Ultrasonic sensor not detecting any values when using Arduino and LabVIEW

I have connected the circuit as shown. The circuit works perfectly when I Use the Arduino ide. When I use LabVIEW, the distance from the ultrasonic sensor is always zero. The LabVIEW circuit diagram ...
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Labview inverse Fourier transform: Why can't I visualize Gibb's effect (or ringing)?

I am studying electrical engineering and have an assignment which I have been working on for couple weeks, but can't solve. I have a discontinuous function as shown below and applied a FFT on it, ...
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Can LabVIEW be used instead of an oscilloscope to measure signals?

I've been thinking about buying an oscilloscope for self usage. However, searching for oscilloscopes on Google reveals that they are very expensive - the cheapest I found was about $200. It turns out, ...
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Help replacing a physical joystick for motor control with a LabView program

I'd like to start by acknowledging the similarity of this question to this one, but I really need a more basic, step-by-step explanation. I am trying to help a student in my lab design a program to ...
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I need to design a second order active filter low-pass Rauch structure of Bessel. Design data: f-cut = 15 Hz; C1 = 50 pF. More info in img [closed]

How can I find the values requierd? I tried using the formulas my teacher gave me but c2 is 0 when i use them. Am i doing something wrong? should i use other formulas? I tried to ask the teacher but ...
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Why am I not receiving a 60 MHz signal from CLKOUT in sync.FIFO mode on the FT2232H?

I tried to set sync.FIFO mode on FT2232H. According to paragraph 4 (pg.10) of AN_130 (FT2232H Used in an FT245 Style Synchronous FIFO Mode) I expected a 60MHz signal at pin No.32 (CLKOUT) after set ...
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Labview power and frequency sweep

I am kind of new to Labview. I am trying to control a Keysight N5173B RF signal generator to do an amplitude and frequency sweep. I made some block diagrams, but I could not get a proper result. I ...
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Labview cannot send command error

i'm trying to control keysight instrument. And i constructed a block diagram in Labview. It works at first, but at second time it won't even respond to *IDN? Command. Visa read block gives timeout ...
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Electrical device to keep circuit open once an open is detected

I'm working on a laboratory setup that has eight electric motors running at high speed. The motors are enabled by sending a 5 V enable signal from a NI DAQ setup/LabVIEW to the motor amplifiers. ...
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1 answer
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Sawtooth to Straight line in Simulink

There is a component in LabVIEW called as "Inverse Modulus". It is used to eliminate the discontinuous jump that would occur when the DAC encoder of the hardware reaches the limits of this range. ...
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16 bit VISA Write in LABView

I am trying to communicate with a LIN sensor device via a PC COM port (I built a board that converts USB to UART and then UART to LIN). The board works and I wrote a simple Matlab script to grab data ...
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Measuring current using ACS 712 with NI DAQ 9215

I am trying to measure current from Ignition coil(12V, 4.5A). i used arduino to measure current. And it worked good. And i connected the ACS712 signal pin to NI DAQ 9215. At zero current the output ...
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1 answer
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Holding signal true for x seconds in LabView

I'm trying to create an automatic startup override system whereby when an ESD override button is clicked, a signal will be held true for 10 seconds overriding my ESD interlocks. This seems like there ...
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1 vote
1 answer
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In a Generator, why when the Exciter voltage increases the Generator Voltage decreases?

I have a project where I have to build an electrical model of a generator with constant torque at 1500 RPM and simulate it in LabView. I have a manual that describes some measurements that were made ...
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Pressure transducer being read using Labview

I understand this is not a typical question for this forum, and that NI Labview forum would be better (I posted there too), but I am hoping that someone who is proficient in Labview will see this. I ...
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1 answer
850 views

How can I transmit a TTL signal to a computer?

I am designing a data acquisition system including a sensor that outputs a TTL pulse signal (3 wires: power supply, common, and signal). I am trying to determine how to send this signal to a program ...
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2 answers
644 views

how to bumplessly switch between two control signals?

I have a Labview program which sends 4-20ma current signal through a ni usb device to control the speed of a motor by controlling a sew eurodrive MOVIDRIVE ® MDX60B / 61B. Here is the data sheet of ...
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1 vote
1 answer
342 views

Can change number of data bits in NI LabVIEW's VISA serial?

I need to send 16 bits of data through serial UART to LabVIEW. I have 16bits of data frames with 1 start bit, 1 stop bit, and 1 parity bit. Is it possible to change the number of data bits in VISA ...
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-2 votes
1 answer
368 views

fire detection system with lm358 using arduino and labview.I want help regarding if my circuit is correct or not?VI

I'm a beginner working on this system (Link). I build the hardware similiar to the link and I did a software implementation on Lab view as well, but only the buzzer starts when temperature is ...
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1 answer
188 views

How do I obtain readings using an AD8302?

I need to use an AD 8302 Gain and Phase detector along with a SynthHD frequency generator to design a Vector Network Analyzer. Before I get to that I wanted to try and obtain readings on my PC. There ...
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LabView drivers for Keithley 6487. where to find documentation?

I have to set up a program for measuring the IV characteristics of some components using LabView. At the time of writing I'm studying the basics of the G language (LabView programming language) for ...
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2 votes
2 answers
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FFT in LabView using DAQ

Familiar with the FFT and LabView. Can I use LabView to compute and display the FFT of an analog signal in real-time rather than computing it from a data array?
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